Carriage-return mechanism.



G. W. KNGLL.

' CARRIAGE RETURN MEGHANISM. APPLICATION FILED NOV. 23, 1911. RENEWBD JULY25, MM2. ly l @7553@ mmm, Aug. w, w14.

4. SHEETS-SHEET l. w

Gr. W. KNOLL.

CARRIAGE RETURN MBGHANISM. APPLIOATIQN 1111311.11017. 23, 1911. RBNBWED JULY 25, 11112.

1931 7953@ Patented Aug. i8, 191

i SHEETS-SHEET 2.

G. W. KNOLL. y CARRIAGE RETURN MBGHANISM. APPLICATION FILED NOV. 23, 1911. RENBWED JULY 25, i912.

Patented Aug. 8, 19ML.

& SHEETS-SHEET 3.

G. W. KNOLL. CARRIAGE RETURN MECHANISM. PPLIUATION FILED 110.17.23, 1911. RBNEWBD JULY 25u 11112.

191117953., Patented Aug. 18, 1914..

4 SHEETS-SHEET 4.

MW /A @w w/ a carriage return UnrrED STATES Parnnr Ormea.v

' GEORGE W. KNOLL, OF CHICAGO, ILLINOIS, ASSIGNOR, BY DIRECT AND MESNE ASSIGN- MENTS, TO JOHN THOMAS UNDER/WOOD,

or BROOKLYN, lNew YORK.

CARRIAGEFRETURN MECHANISM, i

Application filed November 23, 1911, Serial 110.662,

l'This invention relates to typewriters, and

one object 'of the invention 1s to provide im-` proved mechanism, under the control of the operator, for speedily returning the carriage of the typewriter to the startingy point of a new line.

Another object is to provide improved mechanism with line-spac ing mechanism adapted to be set in motion at anypoint on the line, by means of a carriage return key lever, and-thereafter automatically arrested at the starting point of a new line.

Another object is to provide a simple form' of cushioning device in connection with the carriage return mechanism to pre- Fig. i. Fig.

vent jarring between the,carriage.and type? writer frame when the carriage is returned.

Aanother object is to provide the carriage returnmechanism with a continuously runningfmotor for'effecting the movement of the'v carriage, and with clutch mechanism, operated by a carriage return key lever for coupling the motor with the carriage in such4 manner that it mL y propel'the same toward its starting point.

Other objects and advantages will appear in the course of this speeiiication and with all ot said objects and advantagesinview, this invention lconsists in the several novel features hereinafter set forth and claimed. The invention is clearly illustrated in the drawings` furnished herewith, in which:

Figure l is a plan of afstandard formof Remington typewriter, stripped of most of its 'Operating mechanism, and showing the preferred form 'of my improved carriage'return applied thereto. Fig. 2 is a side elevation 4of the parts seen in Fig. 1, looking in the direction of the arrow.A 2 in 3 is a detail ,front elevation of a. fragment of the Atypewriter frame, showing a carriage return key lever in cross section and showing in front elevation a guide and returning spring Jfor the Akey lever. Fig. 4 is a view in rear elevation of the partsseen in Figs. l and 2, with the Specification of Letters Patent.

in the county of Cook and Statel associated therewith andv Patented Aug. 1 8, 1914 009. Renewed July 2'5, 1912. Serial No.' 711,577.

motor and motor carrying bracket out-away on the line 4.-4.- Oi' Fig. 2. Fig. 5 is a detail fragmentary rear view .of certain bars carried by the' typewritercarriage, certain portions of the clutch releasing mechanism and carriage returning mechanism, the view being taken from the line 5-5 in Fig. 1, and looking in the vdirection of the arrows. Figi 6 is a detail plan viewof the lefthand portion of the mechanism illustrated in Fig. 5. Fig. 7 is a detail view, illustrating the connections between the carriage shifting bar and the line-spacing mechanism ofthe typewriter, the viewbeing partly inside .elevation and partly in longitudinal section taken on the line 7 7, Fig. 1. Fig. 8 islv a detail vertical section of the clutch mechanism, the line of section being indicated at. 8-8 in Fig.. 4. Fig. 9 is a detailplan-of a clutch leverand adjacent parts. Fig. l0 is a detail front elevation of a fragment of the'typewriterframe, the carriage, 'and a certain cushioning device for taking up thear between the carriage and frame.

One form of the invention is illustrated in the drawings to show its application to a, standard form of Remington typewriter, and. as is well understood to those skilled in the art to which this invention pertains, the typewriter frame A has mount ed thereon a traveling carriage B, guided to move on vrails a, al, supported on top of the typewriter frame. Typewriters of `this kind are provided with suitable mechanism for printing upon a sheet of paper carried by a platen or roller b, revolubly secured in the carriage and having a line-spacing lever b1 connected to turn the platen by means of mechanism including a pawl b2, adapted to engage with a toothed 'disk b3, fast on the axle of the platen. AThe construction and operation of the parts men tioned are well known and understood by thoseskilled in the art. ln the form of Remington typewriter illustrated in the drawings, tabulating mechanism; is associated therewith, and as is well'known, a tabulator'rack bar C is secured to and supported by brackets o, c1, fastened to the rear end of thecarriage B, and rigidly connectin'g the tabulator bar C with the carriage B.

lIn the form of carriage return mechanism 12 in the direction of the'arrow (Fig. 1),

from the frame of the typewriter as by a bracket 13, secured to the rear end of the frame by screws 14. The motor rests upon screws or bolts 15, and is( secured to the bracket 13 by bolts 16, whereby the motor maybe adjusted to properly position the same with'respect to other members of the connections between the motor and carriage.

The rack bar 11 is shown as located below und in front of the tabula-tor bar C, andsupported on the underside of the brackets c, c1 by rollers 17 supported byl and projecting down from the brackets c, c1, and turning in longitudinally extending grooves 18 formed in the sides of the bar 11 (Figs. 4, 5 and 7 This arrangementA affords one means for slidably eonnectinr thebar 11 with the carriage, so that it has a limited amount of movement relatively to .the `carriage, and said bar 11 is'form'ed .with shoul:

ders 19, 20 arranged to strilieithejbrackets c, c1 at the limits of its strokes. rfitlr.re`spect to the carriage. This sliding ntiliine'd'toVV` effect. the linespacing in .the form of the invention shown.- When the bar 11 has been moved from the positionindicated in 4 to that indicated in Fig. 5, the shoulder 19 strikes the bracket e1 so that further movement of the bar toward the left, as viewed` in said figures, will move same direction.

It is to be observedthat the shoulder 19 of the bar 11 strikes against a rigid element of the carriage, thereby insuring. positive movement of the carriage, and effecting such movement by means of substantial elements, thus eliminating wear and tear tol a great degree. A spring 21 atthe carriage in the tached to the bar 11 and bracket c retracts the bar 1.1i after the carriage has been re` turnedto lits startinor point.

.In the preferred form of connections be;

tween the motor and carriage two contacting friction disks 22, 23 carried by shafts 24, 25 are employed, one being loose on its shaft, and the other being fast on its shaft. 'As here shown the disk 22 is .fast on the m'o 'torshaft 24, while the disk`23 is loose upon its shaft 25 (Fig. 8.)., but arranged to be coupled thereto by clutch mechanism 26. r1 he disk 22 is preferably of smaller diameter than the driven disk y23 to reduce the speed, and said disk 22 may be shifted back and forth on the motor shaft 24 to increase collar 27 having a conicalinner bearin face 28 arranged to be moved into frictiona contact with the conical face 29 of a second clutch member in the form 'of a cone 30 projecting up from the disk 23. The clutch collar 27 is pivoted transversely of the shaft 25, as by a pin 3l secured in the shaft and extending into vertical slots 32 formed iny the neck 33 of the collar 27 thus permitting of a limited vertical movement of said collar with respect to the shaft 25.

A clutch lever 34 (Figs. 4 and 9), fulcrumed upon a bracket 35, connects wlth the clutch collar 27 at one end, and with a link 36 at its other end, said lever 34 being forked to straddlethe neck of the collar and connected thereto by a ring 37 seated in an anof the carriage return key lever 38 is guided to move in a vertical plane `by a plate 40 secnred to the typewriter frame and having a verticali' slotin which the lever 38 plays.-

A spring 41 connected to the plate 40 and lever 38 acts to lraisethefr'ont end of the lever to normal position after it has' been depressed andA released. f It is ,obvious that by depressing said key 38a, the'link 3 6 is raised and the clutch lever 34 rocked ,in the direction of the arrow in Fig. 4, thereby forcing the clutch collar down upon the cone 30 and i locking'the shaft 25 with the disk 23. Said disk being looseupon its shaft, normally rests loosely upon the disk 22, and is continuously driven idly by the motor through fric-tional engagement with the disk 22. The frictional pressure between the clutch membersdand alsobetweenthe rotating disks 22 and 23 is controlled by and varies with the Fast on the upper end of the shaft 25 is a bevel pinion.41 that meshes with a bevel gear 42' fast upon a horizontal counter shaft 44 journaled in a bracket 45 secured to the top of the typewriter frame. A tobthed wheel 46, fast upon said counter shaft 44, meshes with the rack bar 11 and propels said bar and the carriage when 'set in. motion by the motor. As the carriage is 'being advanced, during operation of printing, the toothed wheel is turned in a retrograde direction by said bar, and consequently its shaft, the gears 41,42, shaft 25 and clutch collar 27 are turned back to normal position. Itis to 4be observed that so longasthe key -vided with a-finger key 38a. The front end lie fprcssure on the finger key 38,

38a.is held down, the 4 clutch 26 remains in y raz? ' be arres desirable that the carriage be arrested at the starting point of a new line, and the clutch disconnected' automatically at such p eriod,

being securedin place on said tabulating bar at any of the notches thereon, thus. determining the point at which the-carriage isto ted at the end of itsl return movenient. Said' finger or trip device is arranged to engageand depress an armI 48 that lies in its path ofmovement, said arm beingfast upon a rock shaft 49 journaled in a bracket 50 supported on top of the typewriter frame (Figs. 1, 4 and `5) .i On said rock shaft 49 is secured a 'second arm 51 that is operatively connected with the c lutch lever 34 by'a link 52, whereby whenever the free end of said arm 48 is depressed, the end of the arm 51 and the link 52 is raised thus raising the forked end o f the clutch lever 34, and disconnecting the clutch collar from the cone. 4 The cushioning device is best seen in Figs. 1 and 10, and as shown .comprises a bent finger 53 adjustably secured lto thescal'e bar 5 4 of the carriage and arranged to strike against ay projecting pin 55 of the cushioning device. Said pin'is slidably mounted inl a bracket 56 stationarilyj supported on the front of the rail al of the typewriter frame` As Vshown the pin 55 is guided to move longi.

tudinally in slots insaid bracket and has a limited amount of movement therein controlled by a spring 57 secured to said pin 55 and to the bracket 5G. The tension of thespring arrests the momentum of the car.

ria'ge as the bent .finger 53 strikes the 'pin 55 and extends the spring 57. The fingers 47 and 53 are set upon the bars C and 54,'-respectively, so that the finger 47 may disconnect the clutch at or about the time that the finger strikes the pin55.

The line-spacing is effected by a simple mechanism operated from the bar- 11, which bar is arranged to shift a link 58, that connects with the pawl b2. In the form shown the end of the bar 11 carriesa plate 59 having an angularly'disposed bearing edge 60 that bears against a roller 61 carried by the link 58 (Figs. 5, 6 and 7). Fig. 1 shows the bar 11 and-bearing plate' 59 in normal position relatively to the roller 61, and Figs. 5 and 6 Ashow it shifted to effect the shifting ofthe link 58. A elip'62, secured to the bar C overhangs the link 58.to guide its movement in a straight line. The link is preferably made in two pieces connected by a bolt threaded in one piece and .extending through a lslot in the other, whereby if desired the two parts of the link may slide one upon the other by unscrewing Ithe bolt. rlhis is done when it is desired t'o move the platen more than one tooth at a time with the lline-spacing lever b1.

:in the operation of the carriage returnV mechanism, the operator sets the fingers 47 and 53 at the desired points to bring the carriage to a stop at the place determined upon. A line having been written, the operator depresses the key 38, thereby coupling toy gether the two members of the clutch mechanism, and at the same time lowering the iink 52and swinging the arm 48 upward and into-the path of the finger 47. The motor,

being in continuous operation, immediately sets the gearing between the disk and bar 11, in motion, therebj,y first shifting the bar i 11 over until the stop 19 strikes the bracket c1, and operates the line-spacing mechanismafter which the further movement of the bai' 11 ca-uses'the carriage to move therewith toward the starting point u ntil the finger 47 strikes and depresses the arm 48, thereby unclutching the collar from the cone of the Y ciutch mechanism and returning the'key le' ver 3 8, although the operator-still has his finger on the carriage return key 38a'. Si-4 multaneously with the disconnection of the clutch members, the bent finger 53 strikes the'pin of the cushioning device and the fnomentumof the carriage is arrested by the spring 57 as the carriage comes to a fullstop atvthe'beginning of a new line.

Itis obvious that the operator may, if so desired, manually return the carriage by using the line-spacing lever b1 without inter fering with the mechanical carriage return mechanism, which is an important feature in devices of this character. f By reason lof the fact that the motor is continuously running, the carriage is returned quickly `and i with a steady even motion; Ano'jars or shocks are occasioned bythe use of the present form of carriage return mechanism, and this is a very important consideration in machines of this type, as it eliminates the danger of .in- I jury and heavy wear upon the machine.

j-Variations may be resorted to within the iii scope of the invention, and portions of the .improvements mayl be used without others.

Having thus vdescribed my invention, I claim:

1. In fombination, a typewriter frame, a carriage slidably mounted thereon, a rack bar operatively connected to said carriage, a toothed wheel meshing with said rack bar, a continuously ruiming motor, a pair of fric- 'tionl disks, one of which is directly-'driven by said motor, a shaft operatively connected to said toothed wheel, friction clutch'mechanism between said shaft and the other friction disk, and a carriage return key lever operatively connected with the 'clutch mechanism. 2. Carriage return mechanism comprising arrack bar arranged to be secured to a typewriter earria-ge, a toothed wheel meshing v between said shaft and toothed wheel, a. mo-

tor driven disk on said shaft, clutch mechanism for coupling said shaft to said disk, a clutch lever connected to one member of said clutch mechanism, a carriage return key lever, and a link connecting said clutch lever with saidcarriage return key lever.

4. Carriage return mechanism comprising a rotary shaft, power transmitting mecha! nism arranged to translate the rotar-y motion of said shaft into a rectilinear movement-of a typewriter carriage, a friction disk on said shaft, a motor driven. disk frictionally en- 'gaging and driving said first-named disk, a clutch to transmit the motion of said' disks to the said shaft,` said clutch comprising a collar on said shaft and rotatively connected therewith and a clutch cone on said, rstmentioned disk, a carriage return key lever, and operative connections between said lever and clutch collar Afor engaging the latter with the clutch cone.

5. Carriage return mechanism comprising a motor driven shaft, clutch mechanism, a.,

carriage return `key lever to operate the clutch mechanism for operatively coupling said shaft with its prime mover, power transmitting mechanism for translating the rotary motion of said shaft into a .rectilinear movement of a typewriter carriage, a trip member secured to and moving with said carriage, and clutch releasing mechanism having an element lying in the` path of said trip member andai-ranged to be actuated thereby to unclutch the clutch mechanism.

6. Carriage 'return mechanism comprising a' motor driven shaft, clutch mechanism, a carriage return key lever to operate the clutch mechanism for operatively coupling said shaft vwith its prime mover, power transmitting mechanism-for translating the rotary motion of said shaft into a rectilinear movement of a typewriter 'carriage,.a trip member secured to and moving 'with said carriage, a rocking element having one arm lying'in'the path of said tripy member, and a link connected to another arm of said rocking element` and connectedA with one member of the clutch mechanism.

7, Carriage return mechanism comprising a motory driven shaft, clutch mechanism` a carriage return key lever to operate the clutch mechanlsm for 'operatively coupling `vated by the power of the motor to ed on said carriage, pawl and ratchet linespacing mechanism for said platen, a rack bar mounted on said carriage and 'having a limited amount of sliding movement relative thereto, a toothed wheel meshing with said rack bar for moving the same and its carriage in one direction, operative connections between said'rack bar and linespa-cing pawl, a continuously running motor, gearing comprising a friction clutch between the motor and said toothed wheel, and a` key to actuate said clutchto connect the motor to drive said wheel.

9. lnv combination, a typewriter frame, a carriage thereon, a platen rotatively mount# ed.on said carriage, pawl and ratchet linespacingl mechanism for said platen, a shouldered rack bar. brackets secured to the carriage and supporting said rack bar, said rack bar having a limited yamount of lost motion with respect to said brackets at the limit of its lost motion, a power driven toothed wheel meshing with said rack bar and arranged to movefthe samein a direction to return the carriage, a bearing plate carried by said rack bar and having an' angularly disposed bearing face, and a link connected with 4said pawl and having a roller arranged to be engaged by said bearing face of the plate.

l0. In a typewriting machine, the combination with a carriage having a letterfeeding movement, of a motor for returning said` carriage, a clutch intermediate said carriage and motor, a key arranged to close said clutch, and an arm moved by said re turning carriage to positively release said clutch by the powerA supplied through the carriage.

1,1. In a typewritingmachine, the combination with ai carriage having a letter'- feeding movement, 'of a. constantly running motor for returning said carriage, a clutch intermediate said carriage and motor, a key arrangedvto close said clutch, and an arm moved by said returning carriage and oper-kr positively release said clutch. i

l2. In a typewriting machine, the combination with a carriage having a letter-feeding movement, of a constantly running motor for returning said carriage, a clutch intermediate said carriage 'and motor, a key `arranged to close said clutch, and an armv ids operated positively by said returning carriage to positively release said clutch and positively return said key to its normal position. 13. In a typewriting machine, the combination with a carriage having a letter-feeding movement, of a motor to return said carriage, a clutch intermediate said carriage and motor, a key arranged to close said clutch, an arm arranged to releaseg said clutch, and an arm on said carriage are ranged to move said first arm to release said clutch as the carriagel returns 'to its starting point and to hold said clutch released over several letter-spaces.

14. In a typewriting machine, the combi nation with a carriage having a letterefeeding movement, of a motor to return said carriage, a clutch intermediate 'said carriage and motor, a key arranged to close said clutch, an arm arranged to release said clutch, a rack on said carriage arranged to hold tabulator stops, and a stop member adjustable on said rack to move said arm to' release said clutch as the carriage returns to.

the starting point, and to hold said clutch released over several-letter-spaces.

`15. In a typewriting machine, the combination with a carriage and a motor to return the carriage, of driving connections between lthe motor and carriage including frictional driving members in rolling contact, a clutch, a key to actuate the clutch and'control the friction between said members, and means to automatically release the clutch and disconnect -the carriage from the motor before the carriage has completed its return movement.

16. In a typewriting machine, the combination with a carriage and a motor to return' the carriage, of drivlng connections between the motor and carriage comprising friction disks .in rolling contact, a friction clutch member carried with one of the disks, a cooperating clutch member, and a key operariage.

tively connected to said last-named clutch member to actuate the clutch and to vary Ithe pressure between said disks in response to variations in pressure on said'key.

x17. In a typewriting machine," the vcombination with a carriage and a motor to drive' the carriage forward, of a drive shaft, a

-rack and pinion forming a driving connecj means to connect the drive shaft to said second motor, a rack and pinion betweensaid drive shaft and the carriage, `and means operated by said drive shaft to automatically disconnect said second motor from said drive shaft during the return of thecaf- 19. The combination with a carriage and a motor to` return the carriage, of a drive shaft, a driving connection between said shaft and the carriage, gearing' between said shaft and motor comprising a clutch, a key to operate the clutch and thereby connect the motor to the drive shaft, and means op. erated by said shaft to open said clutch and restore the key during the return movement of the carriage.

In witness whereof, I have hereunto set my hand at Chicago, Cook county, Illinois, this 21st day of November 1911.

\ GEORGE W. KNOLL.

Witnesses: I

CHARLES O. SHERvnY, FANNIE F. RICHARDS. 

